<template>
  <div>
    <h2>随机点名</h2>
    <div class="box">
      <span>名字是：</span>
      <div class="qs">{{ name }}</div>
    </div>
    <div class="btns">
      <button @click="start" class="start">开始</button>
      <button @click="end" class="end">结束</button>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      name: "",
      arr: ["关羽", "张飞", "马超", "赵云"],
      timer: "",
    };
  },
  methods: {
    start() {
      this.timer = setInterval(() => {
        let item = Math.round(Math.random() * (this.arr.length - 1));
        this.name = this.arr[item];
      }, 10);
    },
    end() {
      clearInterval(this.timer);
    },
  },
};
</script>

<style>
* {
  margin: 0;
  padding: 0;
}

h2 {
  text-align: center;
}

.box {
  width: 600px;
  margin: 50px auto;
  display: flex;
  font-size: 25px;
  line-height: 40px;
}

.qs {
  width: 450px;
  height: 40px;
  color: red;
}

.btns {
  text-align: center;
}

.btns button {
  width: 120px;
  height: 35px;
  margin: 0 50px;
}
</style>